feat: add volume keys for page turning, closes #471 (#982)

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/android/src/main/java/NativeBridgePlugin.kt

@@ -6,6 +6,7 @@ import android.net.Uri
 import android.util.Log
 import android.os.Build
 import android.view.View
+import android.view.KeyEvent
 import android.view.WindowInsets
 import android.view.WindowManager
 import android.view.WindowInsetsController
@@ -49,6 +50,17 @@ class SetSystemUIVisibilityRequestArgs {
   var darkMode: Boolean? = false
 }
 
+@InvokeArg
+class InterceptKeysRequestArgs {
+  var volumeKeys: Boolean? = null
+  var backKey: Boolean? = null
+}
+
+interface KeyDownInterceptor {
+    fun interceptVolumeKeys(enabled: Boolean)
+    fun interceptBackKey(enabled: Boolean)
+}
+
 @TauriPlugin
 class NativeBridgePlugin(private val activity: Activity): Plugin(activity) {
     private val implementation = NativeBridge()
@@ -289,4 +301,24 @@ class NativeBridgePlugin(private val activity: Activity): Plugin(activity) {
         }
         invoke.resolve(ret)
     }
+
+    @Command
+    fun intercept_keys(invoke: Invoke) {
+        val args = invoke.parseArgs(InterceptKeysRequestArgs::class.java)
+        if (activity is KeyDownInterceptor) {
+          when (args.backKey) {
+              true -> (activity as KeyDownInterceptor).interceptBackKey(true)
+              false -> (activity as KeyDownInterceptor).interceptBackKey(false)
+              else -> {}
+          }
+          when (args.volumeKeys) {
+              true -> (activity as KeyDownInterceptor).interceptVolumeKeys(true)
+              false -> (activity as KeyDownInterceptor).interceptVolumeKeys(false)
+              else -> {}
+          }
+        } else {
+            Log.e("NativeBridgePlugin", "Activity does not implement KeyDownInterceptor")
+        }
+        invoke.resolve()
+    }
 }